Cc libpcap maintainers; context is #1016129 on debbugs. From diffing around between a buster and a bullseye system, I could track this bug down:
libpcap0.8: 1.10.0-2 500 500 http://deb.debian.org/debian bullseye/main amd64 Packages 1.10.0-2~bpo10+1 100 100 http://deb.debian.org/debian buster-backports/main amd64 Packages 1.8.1-6+deb10u1 500 500 http://deb.debian.org/debian buster/main amd64 Packages Installing 1.10.0-2~bpo10+1 on buster breaks ipv6toolkit. Installing 1.10.0-2~bpo10+1 on bullseye does not fix ipv6toolkit, installing 1.8.1-6+deb10u1 on bullseye (which temporarily breaks tcpdump) does fix ipv6toolkit. So there’s either something in the newer libpcap that breaks ipv6toolkit, or something in ipv6toolkit that’s not yet compatible with newer libpcap. bye, //mirabilos -- Yay for having to rewrite other people's Bash scripts because bash suddenly stopped supporting the bash extensions they make use of -- Tonnerre Lombard in #nosec